linux-kernel - Re: [PATCH v15] i2c: virtio: add a virtio i2c frontend driver

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Date:   Mon, 26 Jul 2021 09:29:02 +0530
From:   Viresh Kumar <viresh.kumar@...aro.org>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Jie Deng <jie.deng@...el.com>,
        Linux I2C <linux-i2c@...r.kernel.org>,
        "open list:DRM DRIVER FOR QEMU'S CIRRUS DEVICE" 
        <virtualization@...ts.linux-foundation.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Wolfram Sang <wsa@...nel.org>,
        Wolfram Sang <wsa+renesas@...g-engineering.com>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        Jason Wang <jasowang@...hat.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        yu1.wang@...el.com, conghui.chen@...el.com,
        Stefan Hajnoczi <stefanha@...hat.com>,
        gregkh <gregkh@...uxfoundation.org>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Alex Bennée <alex.bennee@...aro.org>,
        jiedeng@...mni.sjtu.edu.cn
Subject: Re: [PATCH v15] i2c: virtio: add a virtio i2c frontend driver

On 23-07-21, 11:03, Arnd Bergmann wrote:
> > index 70a8057a..99aa27b 100644
> > --- a/include/uapi/linux/virtio_ids.h
> > +++ b/include/uapi/linux/virtio_ids.h
> > @@ -55,6 +55,7 @@
> >  #define VIRTIO_ID_FS                   26 /* virtio filesystem */
> >  #define VIRTIO_ID_PMEM                 27 /* virtio pmem */
> >  #define VIRTIO_ID_MAC80211_HWSIM       29 /* virtio mac80211-hwsim */
> > +#define VIRTIO_ID_I2C_ADAPTER          34 /* virtio i2c adapter */
> >  #define VIRTIO_ID_BT                   40 /* virtio bluetooth */
> 
> This will now conflict with Viresh's patch that adds all the other IDs.
> Not sure if there is anything to be done about that.

An easier way of avoiding all such conflicts can be:

- Michael applies my first patch (which sync's the device id's from specs) for
  5.14-rc4. Rest of the patches can go for 5.15.

- And then Wolfram applies this series over rc4 instead of rc1.

Or we can leave the conflict there for Linus to handle.

-- 
viresh